Question

I have a file (file.txt), and I need to empty his current content, and then to append some text multiple times.

Example: file.txt current content is:

aaa

bbb

ccc

I want to remove this content, and then to append the first time:

ddd

The second time:

eee

And so on…

I tried this:

// empty the current content
fileOut = new FileWriter("file.txt");
fileOut.write("");
fileOut.close();

// append
fileOut = new FileWriter("file.txt", true);

// when I want to write something I just do this multiple times:
fileOut.write("text");
fileOut.flush();

This works fine, but it seems inefficient because I open the file 2 times just for remove the current content.

Answer 1

When you open up the file to write it with your new text, it will overwrite whatever is in the file already.

A good way to do this is

// empty the current content
fileOut = new FileWriter("file.txt");
fileOut.write("");
fileOut.append("all your text");
fileOut.close();